y_or_n= input("是否退出程序（y/n)?")
while y_or_n != "y":
    #性别
    gender = input("性别:")
    print(type(gender))
    #体重(kg)
    weight=float(input("体重(kg):"))
    #身高（cm)
    height=float(input("身高(cm):"))
    #年龄
    age=int(input("年龄:"))

    if gender == "男" :
        # 男性
        bmr=(13.7*weight)+(5.0*height)-(6.8*age)+66
    elif gender == "女":
       # 女性
       bmr= (9.6*weight) + (1.8*height) - (4.7*age) + 65.5
    else:
        bmr=-1

    if bmr !=-1:
        print("基础代谢率（大卡）：",bmr)
    else:
        print("暂不支持该性别")
    y_or_n = input("是否退出程序(y/n)?")

